Using Global Temporary Table in Subquery gives NULL - oracle

Question

I am using following query.
SELECT SYSDATE,(SELECT P_PRICE_OPEN FROM GTT_ADJ_PRICE_TABLE WHERE FSYM_ID='P8R3C2-R' AND P_DATE='22-OCT-18' AND P_VOLUME<>0 AND ROWNUM=1) FROM DUAL;
GTT_ADJ_PRICE_TABLE is global temporary table loaded with values when i have executed a function related to it. This GTT preserves rows after commit. This query gives me correct results.
But, If i run the query
SELECT WEEK_END, WEEK_START,
(SELECT P_PRICE_OPEN FROM GTT_ADJ_PRICE_TABLE WHERE P_DATE=WEEK_START) AS WEEKS_OPEN_PRICE,
(SELECT MAX(P_PRICE_HIGH) FROM GTT_ADJ_PRICE_TABLE WHERE FSYM_ID=FID AND P_DATE<=WEEK_END
AND P_DATE>=WEEK_START AND P_VOLUME<>0) AS WEEKLY_HIGH,
(SELECT MIN(P_PRICE_LOW) FROM GTT_ADJ_PRICE_TABLE WHERE FSYM_ID=FID AND P_DATE<=WEEK_END
AND P_DATE>=WEEK_START AND P_VOLUME<>0) AS WEEKLY_LOW,
(SELECT SUM(P_VOLUME) FROM GTT_ADJ_PRICE_TABLE WHERE FSYM_ID=FID AND P_DATE<=WEEK_END
AND P_DATE>=WEEK_START AND P_VOLUME<>0) AS WEEKLY_VOLUME,
P_PRICE
FROM (
SELECT ROWNUM,FID,WEEK_END,P_VOLUME,P_PRICE,
(SELECT P_DATE FROM FP_V2_FP_BASIC_PRICES WHERE FSYM_ID=FID AND P_DATE>=TRUNC(WEEK_END, 'IW') AND P_VOLUME<>0 AND ROWNUM=1) AS WEEK_START
FROM (
SELECT
ROWNUM,FSYM_ID AS FID, WEEK_END,P_VOLUME, P_PRICE,P_PRICE_OPEN,P_PRICE_HIGH,P_PRICE_LOW
FROM (
SELECT ROWNUM,FSYM_ID,P_DATE AS WEEK_END, P_PRICE,P_VOLUME, P_PRICE_OPEN,P_PRICE_HIGH,P_PRICE_LOW,
CASE
WHEN (TO_CHAR(P_DATE,'D') >= AVG(TO_CHAR(P_DATE,'D')) OVER (order by P_DATE DESC rows between 1 preceding and current row) and ROWNUM>=1) or TO_CHAR(P_DATE,'D')=6
THEN 1
ELSE 0
END AS WEEKFLAG
FROM(
SELECT * FROM TABLE (ADJUSTED_PRICE('P8R3C2-R')) WHERE P_VOLUME<>0
)
)WHERE WEEKFLAG=1
)
);
It gives me NULL in WEEKS_OPEN_PRICE,WEEKLY_HIGH,WEEKLY_LOW,WEEKLY_VOLUME.
Please help me to resolve the issue. Thanks in anticipation.

Answer 1

Try with WITH clause. I hope a below query works. I don't have possibility to check.
WITH adjustedPrice AS (
SELECT *
FROM TABLE(adjusted_price('P8R3C2-R'))
WHERE p_volume <> 0
AND TO_CHAR(p_date, 'DY') NOT IN ('SAT', 'SUN')
)
SELECT ap.week,
ap.week_start,
ap.week_end,
ap.weeks_high_price,
ap.weeks_low_price,
ap.weekly_volume,
ws.p_price_open AS weeks_open_price,
we.p_price AS weeks_close_price
FROM (
SELECT TRUNC(p_date, 'IW') AS week,
TRUNC(MIN(p_date)) AS week_start,
TRUNC(MAX(p_date)) AS week_end,
MAX(p_price_high) AS weeks_high_price,
MIN(p_price_low) AS weeks_low_price,
SUM(p_volume) AS weekly_volume
FROM adjustedPrice
GROUP BY TRUNC(p_date, 'IW')
) ap
INNER JOIN adjustedPrice ws ON ws.p_date = ap.week_start
INNER JOIN adjustedPrice we ON we.p_date = ap.week_end
ORDER BY week DESC;

Answer 2

Wanted to post as a comment. But it wont fit there thats why writing it as an answer.
I tried this code to get the week start, end , weeks high price, weeks low price, weekly volume.
select
trunc("P_DATE", 'IW') as week,
min(trunc("P_DATE")) as week_start,
max(trunc("P_DATE")) as week_end,
MAX(P_PRICE_HIGH) AS WEEKS_HIGH_PRICE,
MIN(P_PRICE_LOW) AS WEEKS_LOW_PRICE,
SUM(P_VOLUME) AS WEEKLY_VOLUME
from TABLE
(ADJUSTED_PRICE('P8R3C2-R'))
WHERE
P_VOLUME<>0 AND to_char("P_DATE", 'DY') not in ('SAT','SUN')
group by
trunc("P_DATE", 'IW')
ORDER BY
trunc("P_DATE", 'IW') DESC;
That gave me results in hardly 2-4 seconds. But i want to get the weeks open price where date will be equal to WEEK_START and weeks closing price where date will be equal to WEEK_END.
I tried following approach for the same. But its taking too much time (like 300+ seconds).
SELECT
WEEK,WEEK_START, WEEK_END, WEEKS_HIGH_PRICE,WEEKS_LOW_PRICE,WEEKLY_VOLUME,
(SELECT P_PRICE_OPEN FROM TABLE (ADJUSTED_PRICE('P8R3C2-R')) WHERE P_VOLUME<>0 AND P_DATE=WEEK_START) AS WEEKS_OPEN_PRICE,
(SELECT P_PRICE FROM TABLE (ADJUSTED_PRICE('P8R3C2-R')) WHERE P_VOLUME<>0 AND P_DATE=WEEK_END) AS WEEKS_CLOSE_PRICE
FROM
(
select
trunc("P_DATE", 'IW') as week,
min(trunc("P_DATE")) as week_start,
max(trunc("P_DATE")) as week_end,
MAX(P_PRICE_HIGH) AS WEEKS_HIGH_PRICE,
MIN(P_PRICE_LOW) AS WEEKS_LOW_PRICE,
SUM(P_VOLUME) AS WEEKLY_VOLUME
from TABLE
(ADJUSTED_PRICE('P8R3C2-R'))
WHERE
P_VOLUME<>0 AND to_char("P_DATE", 'DY') not in ('SAT','SUN')
group by
trunc("P_DATE", 'IW')
ORDER BY
trunc("P_DATE", 'IW') DESC
);
If anybody can help me to improve the output time is most welcome.